Thunderbolt is an awful move on Latias - I'd go with Refresh in that spot. After a couple of Calm Minds, Politoed and Jellicent both go down to Dragon Pulse. The reason why you want Refresh is to prevent them from using Toxic and stalling you. Thunderbolt doesn't help much here tbh.

Hmm, I'd try to be more concise and to try and limit big changes like changing pokemon as much as possible. As a rater, you're trying to make the current team work better, more efficiently, not change the team completely so it looks "better" from your point of view. Moveset changes, item changes, or EV spread changes are small changes that, surprisingly, help a team a lot.

oh god no
it took me hours to find a Bolin GIF small enough. Can't wait to get a badge or something, but it doesn't really matter because this one's fine. But really, don't waste your time xD
Perhaps though, since Korra is way more popular than Bo, you could find one. I don't know. I'll keep my eyes out for ya! :D